What does the word seaboard mean?

Usage examples for seaboard

  1. In 1818, while it was still an experiment on the seaboard, one of these craft appeared on Lake Erie. – American Merchant Ships and Sailors by Willis J. Abbot
  2. It has not been found feasible to ship this material many hundreds of miles inland from the seaboard to compete with acid phosphate, but it is an excellent source of phosphoric acid for soils that are not rich in lime. – Crops and Methods for Soil Improvement by Alva Agee